Chery A1 2009 Service Manual page 207

4.
CHECK UPSTREAM O
• Disconnect the ECM electrical connector.
• Check continuity between the following terminals:
COMPONENT
TERMINAL
• Continuity should exist.
• Check harness for short to power.
Is the check result normal?
Yes >>
Go to the next step.
No >>
Repair or replace circuit for an open or short to power in harness or connectors.
5.
CHECK FUEL PRESSURE
• Release the fuel system pressure (See Fuel Pres-
sure Relief Procedure in Section 04 Fuel Delivery).
• Install fuel pressure gauge (2) and check the fuel
pressure (See Fuel Pressure Test in Section 04
Fuel Delivery).
• Observe the following fuel pressures when testing:
Engine Idle
100
03–
DIAGNOSIS & TESTING
SENSOR SIGNAL CIRCUIT
2
O
2
FUEL PRESSURES
Key On
Key Off
SENSOR CIRCUIT
ECM
36
18
380 kPa (3.8 bar) in 10 minutes
400 - 420 kPa (4.0 - 4.2 bar)
O SENSOR
2
3
4
400 kPa (4.0 bar)
Chery Automobile Co., Ltd.
BESM030020